Horticultural luminaire



FIG. 1 is a perspective view of the new design for a horticultural luminaire as seen from the top, front, right side;

FIG. 2 is a front elevational view thereof, the rear view being identical;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is an enlarged right side elevational view thereof; and,

FIG. 6 is an enlarged left side elevational view thereof.

The broken line disclosure is for environmental purposes only and does not form a part of the claimed design. 

CLAIM The ornamental design for a horticultural luminaire, as shown and described. 